Originally posted by: myocardia
Originally posted by: Sentry11
Now, why do I get a P45 or why I do get an X48? What are their differences?
Really, the only substantial difference (to the end user, besides the $100 price difference) is that the X48 runs Crossfire with 16x + 16x PCI-E 2.0, vs. the P45 running Crossfire in 8x + 8x PCI-E 2.0. Note that the P45's Crossfire is still the equivalent (bandwidth-wise) of 16x + 16x PCI-E 1.1, since PCI-E 2.0 has twice the bandwidth of PCI-E 1.1. Oh, and if you're sure you aren't going to be running Crossfire (two ATI video cards), then definitely get the cheaper, more mature P45-- it's 16x PCI-E slot runs @ 16x, as long as you're only using one card.
Now considering the 4870X2 is quite expensive in termsof $550 despite I can afford it, if I deploy P45 which as you said is 16x PCI-E would I lose any bandwidth to X48 and does PCI-E 1.1 matters much compared with PCI-E 2.0?